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New boiler dropping pressure after heating has gone off

Discussion in 'Plumbing and Central Heating' started by FlyingFroglet, 12 Oct 2016.

  1. FlyingFroglet

    FlyingFroglet

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    Hi all, was hoping for some good advice on pressure loss from our new boiler.

    We had the boiler (a Worcester Bosch) installed 3 months ago, along with new radiators which were installed in the same position as the old ones. We have had no problems at all with the boiler on the hot water front, it's been brilliant going from a 20 year old boiler to one that can produce hot water on demand.

    Our problem began 3 weeks ago when we turned the central heating on for the first time since everything had been installed. At first, all was fine, but then the next time we tried to turn the heating on, nothing happened. Upon checking the boiler, we saw why - the pressure was down to zero. We thought that perhaps, as it was the first time being used, that the radiators simply weren't full enough (we know nothing about these things!) and therefore re-pressurised the boiler up to 1.5 bars. All fine and dandy, heating worked fine again, although 2 hours after it had gone off, pressure had fallen to 1 bar. I thought perhaps this was normal, but kept a close eye on it. Next morning, the pressure had fallen a bit further, so had to repressurize the boiler and bleed the radiators. This cycle is now on rinse and repeat every couple of days.

    I have rung the company who installed the boiler, they told us it sounds like a leak somewhere, but until we can find the leak there is nothing they can do about it. I duly checked every single radiator by wrapping strips of tissue around pipes, joints, etc and found a small leak coming from one of the radiators which simply required tightening up to fix. Thought that this would fix the pressure loss problem, but sadly same thing is still happening. Have rung the company who installed the boiler again, they say it must be a leak in our existing pipework that was there before they carried out the work, and they simply don't want anything to do with it. I personally feel they should at least come out and look at the boiler to check for any faults - after all, I did pay out a few thousand pounds for something that it now turns out isn't fit for purpose.

    Does anybody have any suggestions, hints or tips as to what to do next? We have looked closely at every radiator, checked ceilings and floors for any sign of water damage which might be caused by a leak. Short of pulling up floorboards, we're lost as to what on earth to do, and what could be causing the problem. Hot water is still working just fine, which is good, but we have a baby at home and I really would like to be able to have the heating on when the cold weather arrives without worrying constantly and running out to check the boiler pressure every five minutes.
     
  2. Agile

    Agile

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    You don't say but I suspect that you previously had an open vented system and this has been converted into a pressurised one.

    Probably leaking under the floor or other out of sight place!

    Tony
     
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  3. jedi

    jedi

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  4. Eternal Heating

    Eternal Heating

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    get them back in. I agree its your old pipework etc, but that business should of alerted you that this might happen and the consequences of the issue. we always tell the customer what might happen , and that we will work with them to fix it. However the extent of the job may be considerably bigger and so cost more. Either way its the installer that should fix this. If they are part of the WAI scheme, get on to Worcester.
     
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  5. gigz

    gigz

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    They should at least come and have a look. A trained eye might find it or at least rule sections out. Keep at them, sounds like really bad customer service to me. P.S. Check the copper pipe that goes outside is'nt dripping. I know its a new boiler but i've had them out of the box with a flat expansion vessel before.
     
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  6. Razor900

    Razor900

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    Seen a couple of WB that still have the plastic plug in and the exp vessel isn't connected at all!! ;)
     
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  7. Terrywookfit

    Terrywookfit

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    Quality. Installers choice !!
     
  8. gigz

    gigz

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    Yeah, come across that as well. Also went to one where custard said boiler losing pressure. Looked inside boiler and exp vessel not connected. Isolated boiler and fitted hose, opened iso's and couldn't find filling loop anywhere, had units out and everything. Finally went into the loft and found it was tank fed :mad:
     
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  10. FlyingFroglet

    FlyingFroglet

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    After chasing the company up again, and saying I'd get my solicitor involved if they did nothing, the company boss has agreed to send somebody out next Tuesday to take a look. He again told me that it's probably my existing pipework and therefore we'll have to pay for any work done as it's nothing to do with the work his company did. Having read your post, I would add that at no point were we told that there would be any problem with the old pipework. We were told that some of the pipes in the garage connecting to the boiler would need to be changed in order to comply with new regulations on size, but no warning about any other pipework whatsoever. If we had known it would be a problem, then we would have explored whatever the other viable options are at the time of having the boiler and radiators installed.

    I have no clue what WAI is, but we did get the name of the company from looking at a list on the Worcester Bosch site - does this mean I can complain to Worcester about what has happened? It won't help our situation as it stands, but if it prevents somebody else having the problems that we are having, then that's what I will do.
     
  11. HootingOwl

    HootingOwl

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    I feel your pain. Worcester will not give a flying frog about the way you have been treated by their approved installer. If the installer is back at yours looking into a problem then they are not out hanging yet another new worcester boiler on another wall.
    The installer should come out and verify the problem free of charge given that it has just been installed.

    Always choose the installer ahead of the make of boiler. Cowboys love Worcester because they can hide behind the brand.
     
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  12. Be prepared for lot of bulsh1t from them when (and if) they find the leak, and if they give you and invoice don't pay it until you're completely happy. When they changed the rads, did they lift any of the floorboard to readjust the pipework, or where any changes in the position of the tails done from above. They may have cracked an old joint messing around changing the rads, and if they had to lift any of the floorboards, then a nail may have been put through a pipe when nailing them back down again. The hot waters been fine, but when you turned to heating on, the pipes will have expanded, and the movements shown up the problem.
     
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  13. FlyingFroglet

    FlyingFroglet

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    Yes, they lifted up some floorboards in the bedrooms and on the landing. They also laid some new pipework down for the hot water supply after they removed the tanks from the loft. In fact, our shower had to be replaced because it went kerput when it couldn't cope with the higher water pressure - we weren't impressed as nobody had mentioned that this might be a problem until they had started work, at which point we had to pay out for a brand new shower (we had only had our shower installed a year previously).

    The guys who installed everything were really nice, and we only saw the boss once when he came out to check how they were doing. I'm fully expecting a load of twaddle from him if he's the one to come out next week - according to him I am simply 'nattering him' about a problem that isn't anything to do with him.
     
  14. It might not be anything to do with them, but a professional plumber wouldn't take that attitude; they'd bend over backwards to try and help you sort out the problem, and then negotiate some sort of payment, even if it's only a nominal one, if they could prove it wasn't their fault.

    I'm surprised that the shower went wrong, as you can normally change the setting or the innards to handle a higher pressure. I assume it was a thermostatic shower; what make.

    The WAI is a Worcester approved installer, so they're obviously getting a lot of work from there. If they had to rely on word of mouth, they'd be pretty short of work by now. What they don't realise, is that we always tell others about the useless workmen far more so than the ones who've done a good job.
     
  15. FlyingFroglet

    FlyingFroglet

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    It was a Mira electric pump shower, after doing the first days work they told us it might 'explode under the pressure' and sure enough, that's exactly what it did. Just wish we'd been told in advance that there was a distinct possibility for that to happen so we could have set the extra money we needed aside.
     
  16. Razor900

    Razor900

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    Start with the system cold and the pressure at 1.2, run the heating but note the pressure every few minutes and post it up on here. If after 15 mins it's up around 3 you have an expansion vessel issue
     
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